Hydrocarbon motor



@no @I 19,5.

H. P. IDOOLHTTLE HYDROCARBON MOTOR 2 Sheets-Sheet l 11mm-acci@ Filed May 20, 1920 H. P. DOOLITTLE HYDROCARBON MOTOR Dec. 8, 1925.

2 Sheets-Sheet 2 Filed May 20, 1920 Patented Dec. 8, 1925.

UNITED STATES PATENT OFFICE.

HENRY P. DOOLITTLE, OF DETROIT, MICHIGAN, ASSIGNOR TO PACKARD MOTOR CAR COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

HYDROCARBON, MOTOR.

Application filed May 20, 1920. Serial No. 382,778.

To all who-m, 'it Vmay concern.'

Be it known that I, HENRY P. DooLrr'rLE, a citizen of the United States, and resident of Detroit, IVayne County, State or Michigan, have invented' certain new and useful Improvements in Hydrocarbon Motors, of which the following is a speci lieation.

This invention relates to hydrocarbon motors, and particularlyl to combustion heaters therefor.

The object of the invention is to provide in connection with a combustion heater` operable independently of the throttle. means whereby as the throttle is opened more iwidelyI so as to increase the pressure through the intake manifold or conduit, the supply of explosive mixture to the heater will be decreased proportionally, less heat supplied to the main body of mixture, and the heater finallv rendered inoperative upon a prcdetermine extent of opening of the throttle.

IV ith these objects and others in View,

' the invention is lembodied in preferable forni in the-construction and arrangement' hereinafter describedand illustrated in the accompanying drawings, in which- Figure 1 is a side view m elevation, partly 'i in vertical section, showing my invention applied to a hydrocarbon motor;

Figure 2, a cross section on the line 2-2 of Figure 1.

Figure 3, a side elevation, partly in vertical section of another form of the invention, and

Figure 4, a detail perspective of the automatically variablerestriction device shown in Figure 3. y i

Referring to the drawings, 10 indicates a carburetor which may be of any usual type, 11 a hydrocarbon motor, and 12 an intake manifold 4or conduit leading from the carburetor to the motor. In the vertical outlet section of the "conduit leading from the carburetor is mounted a throttle valve 13, preferably of the butterfly type, which may be controlled in the usual manner. Between the throttle and the motor, and preferably in the horizontal part of the conduit, the manifold is adapted to communicate with both the inlet and the outlet of a bypass pipe 14 within which is mounted a combustion heater comprising a mixture receiving chamber 15 and an electric spark plug 16 ltherein connected with the sparking system of the motor. A screen breaks up the mixture as it enters the chamber l5 and a glass window 31 permits inspection of the flame. Within the conduit and adjacent the outlet of this pipe and between the outlet 17 and linlet 18, is mounted a restriction device automatically responsive to an increase in pressure through-the conduit. In the construction shown in Figure 1, this device consists of a valve 19 which occu ies less vertical cross area than that of tie conduit, even when in restricting position, and thus permits the passage of a considerable body of mixture past the same, but at the same time offers a sufficient restriction to induce a 'suction through the bypass. This valve is shown as provided at its lower end with a weight 20 and as pivoted below its center sothat the weight will tend to return the valve to upright, obstructing position. A stop 21 serves to prevent the valve swinging too far forward while a stop 22 similarly serves tov limit the swinging movement of the valve in a downward directionso thatwlien the valve swings toward the motor it will be limited in such movement toa horizontal position; that is, a position in which the body of the valve will be in substantial parallelism with the yWall of the conduit.

lVlien the throttle is closed, or partly` closed, as when the motor is idling, a limited degree of suction will be established through the conduit and tlievalve 19 will remain in upright or substantially upright position so as to aford a restriction or obstruction in the conduit, which will induce a draft through the by-pass and through the combustion heater so as to ,effect a flow of explosive mixture througli the latter, which will be ignited by the spark plug and'thereby enable a supply of burnt gas to be carried into the manifold for the purpose of heating the main body ofthe mixture passing through theconduit. As the main l throttle is o ened more widely the pressure in the con uit will be increased'and the valve 19 .will be carried down against the force of the weight, opening the conduit more widely and thus decreasing the supply of mixture assing through the combustion heater.

ico

hen the throttle is moved t9 a wide open position, the pressure in the conduit'against the valve 19 will be sufiicient to carry the valve to a position substantially parallel with the conduit wall, whereupon the supply of mixture to the combustion heater will be automatically cut off and the heater will cease to function.

In Figure 3 a construction is shown in which the automatically variable restriction means consists of four thin spring leaves placed in the motor in front of the outlet of the by-pass pipe and converging toward the motor end. rlhese leaves are indicated by the numeral 23 and they are fastened at one end to a supporting member 2l. The leaves constitute a yielding funnel, which creates a restrictive action in the conduit so as to induce a draft of explosive mixture through the by-pass and the combustion heater mounted in the latter. Upon an increase in pressure in the conduit due to the greater degree of opening of the throttle, the spring leaves or plates will be expanded until they assume a position of parallelism with the wall of the conduit, whereupon the suction action through the by-pass will be cut off so that the combustion heater will cease to function.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. The combination with the hydrocarbon motor having an intake conduit, and a throttle valve in the intake conduit, of a combustion heater having both its inlet and outlet connected to the conduit on one side of said throttle, and an automatically variable restriction means in the conduit between said inlet and outlet.

2. The combination with a hydrocarbon motor having anV intake conduit, and a throttle valve in the intake conduit, of a combustion heater having both its inlet and outlet connected to t-he conduit on one side of the throttle, and automatically operating valve means in the conduit between said inlet and outlet.

3. The combination with a hydrocarbon motor having an intake conduit, and a f throttle valve 1n the intake conduit, of a combustion heater having both its inlet and outletv connected to the conduit on one side of the throttle, and "valve means in the conduit between said inlet and outlet, arranged nto increase the How of mixture to the heater as the throttle is closed and vice versa.

4, In combination with a hydrocarbon motor, an intake conduit, a throttle, a coni- -bustion heater having a mixture passageway, means between the throttle and motor to restrict the conduit adjacent the heater passageway to effect the suction of explosive mixture through the heater, said means automatically decreasing the volume of mixture passing through the heater as the volume of the mixture passing through the conduit increases.

5. In combination with a hydrocarbon motor, an intake conduit, a throttle, a combustion heater, a passageway leading through the heater and having both inlet and outlet communicating with the intake between the throttle and motor, and variable restriction means in the conduit for inducing a How of mixture through said passageway and operable to increase the area of the conduit as the volume of mixture passing through the conduit increases to thereby reduce the suction in said passageway.

6. In combination with a hydrocarbon, motor, an intake conduit, a throttle, a combustion heater including a passageway having an inlet and an outlet both communicating with said conduit between the throttle and motor and means located in the conduit in front of 'the passagewayA outlet for obstructing the conduit to thereby induce a iow of mixturethrough said passageway, said obstructing means being movable to a position of substantial parallelism with the wall of the conduit upon a predetermined increase in the volume passing through the conduit.

7. In combination with a hydrocarbon motor, an intake conduit, a throttle, a combustion heaterincluding a passageway leaving an outlet and an outlet both communicating with said conduit between the throttle and motor, a valve mounted in said conduit between the inlet and outlet and adapted tov extend transversely of the conduit, said valve being operable to swing to a position substantially parallel with the conduit wall under increased volume passing through the conduit, and means to cause said valve to swing back automatically to obstructing position as the pressure decreases.

8. The combination with a hydrocarbon motor having an intake conduit, and a throttle valve in the intake conduit, ofy a combustion heater having both its inlet and outlet connected to the conduit on one side vof said throttle, and valve means in the conduit separate from but cooperating with the throttle to increase the flow ofy mixture to the heater as the throttle closes and vice versa.

9. The combination with a hydrocarbon motor having an intake conduit, and a throttle valve in the intake conduit, of a combustion heater having both its inlet and outlet connected to the conduit on one side of said throttle, and valve means in the conduit to govern the action ofthe heater, said valve' Hauer P. DooLIrfrLE. 

